# Collision

- Source proto: `rb/api/robot_state.proto`

Message type: collision.

| Field | Type | Label | Description |
| ----- | ---- | ----- | ----------- |
| link1 | [string](../scalar-value-types.md#scalar-value-types) |  |  |
| link2 | [string](../scalar-value-types.md#scalar-value-types) |  |  |
| position1 | [Vec3](../geometry/vec3.md#rb-api-vec3) |  |  |
| position2 | [Vec3](../geometry/vec3.md#rb-api-vec3) |  |  |
| distance | [double](../scalar-value-types.md#scalar-value-types) |  |  |